Friction car-stop.



W. H. DUNN.

FRICTION GAR STOP.

APPLICATION FILED MAR.18, 1911.

Patented Jan. 21; 1913.

FIG. 1

4 |NVENTOR- Wm. 11 1mm.

COLUI\ \BIA PLANOGRAPH c0.. WASHINGTON, D. c.

UNITED STATES PATENT OFFICE.

WILLIAM H. DUNN, or sALEivr, OHIO.

FRICTION CAR-STOP.

To all whom it may concern Be it known that I, lVILLIAM H. DUNN, a citizen of the United States, a resident of ,Salem, in the county of Columbiana and State of Ohio, have invented a new and useful Improvement in Friction Car-Stops; and I do hereby declare the following to be a full, clear, and eXact description thereof.

My invention relates to a novel dev'icefor stopping railway cars or trains by sliding friction. Its object is to prevent the frequent accidents and consequent destruction of rolling stock and track, and great monetary loss consequently incurred by railroads and other owners of rallway cars on account of the failure of the brakes to stop the moving cars at the required point.

\Vhile the air-brakes at present in use on railway trains are generally quite efiicient, they cannot be employed in general where detached cars are run onto a switch or siding into position for receiving a load or for like purposes; and the hand brakes generally depended on to stop such cars are very frequently insufficient to do so, especially as they are very often out of order through the stoppage of such cars at the proper point in the siding to receive the material from the mine or manufactory or to discharge the load; as well as to prevent the necessity of heavy fixed bumpers and the shocks and injury to trains due to their use. Many other uses of my invention will, however, suggest themselves to those skilled in the art, and I claim for my invention all uses to which it,

will be found applicable.

To these ends my invention contemplates, generally stated, a friction plate carried on the head of the rail and longitudinally movable thereon, adapted to receive the car wheel and provided with means for engag- Specification of Letters Patent.

Application filed March 18, 1911.

Patented Jan. 21, 1913.

Serial No. 615,418.

ing with the car after it has passed onto the plate'so that the plate is moved along the rail until the great friction developed between the plate and rail brings the car to a stop.

As illustrated in the'accompanying drawing showing one embodiment of my invention, it consists preferably in two fiat friction-plates carried respectively on the opposite rails of a trackway and spaced by a but fer head against which the wheels abut after they have rolled onto the plates, the receiving ends of the plates being preferably tapered or sharpened to insure the wheels properly rolling onto them, the plates being preferably provided with depending interior flanges along the inner sides of the rail heads.

In said drawings Figure 1 is a diagrammatic side view of a portion of railway track and car illustrating my invention as applied thereto. Fig. 2'isaperspective view on a larger scale of the form of my invention illustrated in Fig. 1. Fig. 3 is a transverse vertical section of the device illustrated in Figs. 1 and 2 and Fig. 4 is a detail vertical section on the line M Fig. 3.

The sliding friction stop 1 illustrated comprises the symmetrical and oppositely disposed friction plates 2 lying fiat on the rail and each provided with interior depending longitudinalflanges 3. The cross member illustrated forms an abutment which engages the forward wheel 6 of the truck 7 of the car 8 shown. The abutment member 5 is preferably embodied in the form of a rolled angle 5 and a filler member 9 of timber or the like, the filler member 9 being incased at its ends by the brackets 4t forged or otherwise attached to the rear ends of the. friction plates 2, the angle bar 5 preferably having its top flanges abutting against the brackets 4, as illustrated. It will be understood, however that any desired form or material of plates 2 and cross abutting member 5 may be employed without departing from the spirit of my invention.

The .plates 2 rest evenly upon the rail heads 10 ofthe rails 11, and have their forward or receiving ends 2 preferably tapered as illustrated in Fig. 2, and provided with the bevel edges 12 so as to easily and smoothly receive the oncoming I forward wheels 6 of the car to be stopped. Each pouring apertures or slots 16.

.20 illustrated -serve to securely pressand plate 2 is a thin plate having its upper surface substantially parallel with the rail head, so that the Wheels are not appreciably raised from thetrack in passing on to the plates, and any violent jolting of the truck and car is thereby dispensed with or greatly decreased. The depending flanges 3 are arranged to register with the inner faces 10 of the rail heads 10, being spaced to proper gage by the cross abutting member The spacing tie-bar 12 is also preferably employed and provided with the turn-buckle 13 by which the spacing or gaging of the friction plates 2 may be somewhat varied, or they may be pressed against the rails if desired.

The sand boxes 15 are preferably employed to deposit sand or hke pulverulent material through the slot 16 upon the rails 11 and between the rail heads 10 and the lower faces of the plates 2, thereby increasing the great sliding friction developed between the said plates and rails when the plates are moved by the wheels of a car. The sand boxes 15 comprise preferably cavities within the filler beams 9 provided attheir upper ends with openings 17 normally closed by screw plugs 18 through which they are filled and replenished with sand and at their lower ends with the said The bolts bind the cross member 5 to the friction plates 2. v v

In the use of my invention the friction stop 1 is placed in position on a track at a proper point to prevent the passage of a car or cars beyond'the point of safety or desired point of stoppage. This will often be near the end of asiding which is usually built at a suitable grade, of say three to eight per cent. so that the cars may be shunted onto it and will travel any desired distance without the, use of a locomotive. The forward wheels 6 of the forward car 8 run over the tapered or sharpened forward .ends 2 of the friction plates 2 and roll upon-said plates until they abut against the cross abutment 5. The abutment 5'is made of sufficient height to prevent forward wheels from passing over the same, the wheels instead moving the friction plates 2 below them along the rails until the great sliding friction developed by the mat-ing friction surfaces of the rails and plates carrying the wheels and car brings the car or train to a stop. If desired, as in stopping any heavy cars or trains, the friction plates 2 may obviously be extended so as to receive the rear as well as the forward wheels of a truck, and various other modifications in the construction and manner of opera- What I claim is:

1. A device of the character specified comprising a non-inclined thin, flat plate adapted to rest upon each rail and receive the wheels of a moving car and provided with means for holding said plates 1n spaced relation and for engaging said car to thereby cause the frictional movement of said plates beneath these wheels along the track.

2-. A device of the character specified comprising tread members adapted to rest upon each rail of a track and to receive the wheels of a moving car, and a member for holding said tread members in spaced relation and adapted to act as an abutment for said wheels.

3. A device of the character described comprising oppositely disposed non-inclined flat plates of thin metal arranged on opposite rails and having tapered forward ends adapted to receive the moving wheels of a car and provided near their rear ends with spacing means for engaging with said car to slide said plates along the rails.

4.. A device of the character specified comprising a pair of plates adapted to be carried on the rails of a track and provided at their rear ends with a spacing abutment adapted to engage the moving wheels, substantially as described.

5. A device of the character specified comprising a pair of flat plates adapted to rest on the rail heads, and each provided with an inward depending flange in combination with an abutting member spacing the rear ends of said plates and adapted to engage the wheels of a car.

6. A device of the character specified comprising a pair of flat plates adapted to rest on the rail heads and each provided with an inward depending flange, in combination with an abutting member arrangednear the rear ends of and connecting said plates and adapted to engage the wheels of a car, and an adjustable spacing member arranged near the front ends of said plates.

7. A device of the character specified comprising a pair of flat plates adapted to receive the wheels of a car upon the rails, and provided with means for holding said plates in spaced relation on the rails and for stopping the wheel upon the plates, and with cavities for pulverulent friction material having open apertures on the rails and adapted to deposit said material when the plates are moved.

8. A device of the character specified comprising a pair of plates adapted to respectively rest upon the rails, and a spacing abutment at their rear ends provided with a cavity for friction material above each of the rails and having an open aperture through the plate to the rail.

. 9. A device of the character specified comprising a pair of elongated flat plates ends of said plates and forming also an adapted to rest respectively upon the rails abutment for the car Wheels.

of a track to receive the Wheels of a car, In testimony whereof, I, the said VIL' each plate having means engaging the sides LIAM H. DUNN, have hereunto set my hand. of the rail to hold the plate in alinement WILLIAM H. DUNN. therewith, a spacing member connecting adjacent ends of said plates and a second spacing member connecting the opposite Witnesses:

NINA STEELE, RALPH W. CAMPBELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Iatents,

Washington, I). C. p 

